-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 To ensure the image has not been corrupted in transmit or tampered with, perform the following two steps to cryptographically verify image integrity: 1. Verify the authenticity of this file by checking that it is signed with our GPG release key: $ curl https://keybase.io/turnkeylinux/pgp_keys.asc | gpg --import $ gpg --list-keys --with-fingerprint release@turnkeylinux.com pub 2048R/A16EB94D 2008-08-15 [expires: 2023-08-12] Key fingerprint = 694C FF26 795A 29BA E07B 4EB5 85C2 5E95 A16E B94D uid Turnkey Linux Release Key $ gpg --verify debian-9-turnkey-mantis_15.1-1_amd64.tar.gz.hash gpg: Signature made using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key " For extra credit you can validate the key's authenticity at: https://keybase.io/turnkeylinux 2. Recalculate the image hash and make sure it matches your choice of hash below. $ sha256sum debian-9-turnkey-mantis_15.1-1_amd64.tar.gz 18d8922584696e6fcd8eab1bc966736d1c0934a8230964da66525035da12bde0 debian-9-turnkey-mantis_15.1-1_amd64.tar.gz $ sha512sum debian-9-turnkey-mantis_15.1-1_amd64.tar.gz 96e04e7fc459fde2a2e36622559f826791d5161cb5998630b6bec3835c1475e25f244a38c6dff8f9da52bac64d985b1292c8b66cd59311620181973cab12073b debian-9-turnkey-mantis_15.1-1_amd64.tar.gz Note, you can compare hashes automatically:: $ sha256sum -c debian-9-turnkey-mantis_15.1-1_amd64.tar.gz.hash debian-9-turnkey-mantis_15.1-1_amd64.tar.gz: OK $ sha512sum -c debian-9-turnkey-mantis_15.1-1_amd64.tar.gz.hash debian-9-turnkey-mantis_15.1-1_amd64.tar.gz: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAlv/phAACgkQhcJelaFu uU2rjQf/VmF0mKHgLjNmR1FTtF3g3nRBg1byI+TZMkTFbjiH3Fdtx+79Mx/1XkJ1 IU27i2l6kAg+1aiQjvNe44WWdM8g6eOlt7LhRSRmUlITbeFwoKwCDbUp89/itoyk Qqd3q/uGDiKTiC3azWp/Bvg6/q8JXVEGORMKtrydgZ2BpwCgkEbzOULDCqI79mk+ q3bNTnLlDWwZCcv0kVK1yDemTZY41s3ONVrgjdd9IP0DcgIoxHKu30VuGga+PcWm anwkdss8XEMrn1MXIMnM8S6OSBfTePya6ng7nG9C7xGzJqjC/G/C2wij97gFoAOR eNtgixdVdn8xUCDt1ryARCBsPtecVg== =cGqx -----END PGP SIGNATURE-----